Fig. 2From: Causal effects of gut microbiome on endometriosis: a two-sample mendelian randomization studyThree main assumptions of Mendelian randomization. (1) IVs selected from datasets were related with exposure; (2) IVs were not related with any confounder factors; (3) IVs can affect outcomes only through exposure, but not in other ways. SNP, single nucleotide polymorphism; IVW, inverse variance-weightedBack to article page